From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60166C00A89 for ; Thu, 5 Nov 2020 07:53:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DB6052151B for ; Thu, 5 Nov 2020 07:53:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="RYn4fYuR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726787AbgKEHxG (ORCPT ); Thu, 5 Nov 2020 02:53:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38914 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726152AbgKEHxG (ORCPT ); Thu, 5 Nov 2020 02:53:06 -0500 Received: from mail-pf1-x443.google.com (mail-pf1-x443.google.com [IPv6:2607:f8b0:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47DD5C0613CF for ; Wed, 4 Nov 2020 23:53:05 -0800 (PST) Received: by mail-pf1-x443.google.com with SMTP id x13so784863pfa.9 for ; Wed, 04 Nov 2020 23:53:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=bJoT66/UqNLguyHFdjjr65GAanM6qVPduIrdt2mBxA4=; b=RYn4fYuRR0mTPAynqhOwzpej/9Pq95W0xHS/17Ax4R7CkM1YEVzyg9QxuvQ6rYT8bw m14C045xaD+lYSADxQYUh+ViBJ1GaiDgmqtbyDl6RlDqDSjtTFFY8CgH2wQb8M3Vf5Kf KVwf+zTFfgy/xd+Gg25GGlO2zQDho7F258ZMDTtAwaOgPB0rGr3gZeOIH6QaA1MlIzwW waEV7kpeK0LNOq8lVkP4vEAuVFqdiiscS6aYBy3mfD8MQAbSICa6SxOldlfGiqvydgX3 hz/f7srdPgqu86Kgo7oRvmbV1slw9+ab6lrbKb48Qc7ymQFPSA+c/l4+QlmwQtlPxBtn iK+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=bJoT66/UqNLguyHFdjjr65GAanM6qVPduIrdt2mBxA4=; b=OLjsIBZiRhXzr8SPiV0RQUiW1HvTyp/DNJHZvG1p4Pr8HKwXGtBjD+1mvKH8xxlWxU gbe+Es4BMl4tGY5D77gNFZmJTHPEO1xnWn/kmBYe/TyZ1s64daVcRI3ULfiIaJIeoO3a Dz9ayUHihCdwPDxnMpP+9z9HAn0x5x69nmViUKhpjYcJrDGkEUeqg4j7UJBNWGvkfa7c siXDr49KgM8LAFfGRmktogllKCs33JzKX8YB+Ly49hS35qQ+yR+eDmF67zCF+M5GBBFx tAr75dQ1i1U8AHWb6KXskqQnjU5WclNPXdyYw32u9kUQWVWgBC/8rYMPxPu/srR35PgS tt1Q== X-Gm-Message-State: AOAM5320H0nIV9lXo5+Mc+vf0WpHj03cbwf01pIVnnfINbooOUcak6DD Nw53Hmj0lkxQfotnIT8hCAM= X-Google-Smtp-Source: ABdhPJxWtdRkHWm3uPzC9d/s1tQzovCzs+7s/F90y4ZOK7EGK/w0LFnuUlQ0ZXe0GYzkpEEmUQZSUw== X-Received: by 2002:a17:90a:80c9:: with SMTP id k9mr1174546pjw.79.1604562784735; Wed, 04 Nov 2020 23:53:04 -0800 (PST) Received: from ?IPv6:2601:647:4700:9b2:bda5:9796:e204:84e? ([2601:647:4700:9b2:bda5:9796:e204:84e]) by smtp.gmail.com with ESMTPSA id k15sm1299208pgh.62.2020.11.04.23.53.03 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 04 Nov 2020 23:53:03 -0800 (PST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.4\)) Subject: Re: [kvm-unit-tests PATCH] x86: check that clflushopt of an MMIO address succeeds From: Nadav Amit In-Reply-To: <20201103160855.261881-1-david.edmondson@oracle.com> Date: Wed, 4 Nov 2020 23:53:01 -0800 Cc: KVM , Joao Martins Content-Transfer-Encoding: quoted-printable Message-Id: References: <20201103160855.261881-1-david.edmondson@oracle.com> To: David Edmondson X-Mailer: Apple Mail (2.3608.120.23.2.4) Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org > On Nov 3, 2020, at 8:08 AM, David Edmondson = wrote: >=20 > Verify that the clflushopt instruction succeeds when applied to an > MMIO address at both cpl0 and cpl3. >=20 > Suggested-by: Joao Martins > Signed-off-by: David Edmondson >=20 [snip] > + ret =3D pci_find_dev(PCI_VENDOR_ID_REDHAT, = PCI_DEVICE_ID_REDHAT_TEST); > + if (ret !=3D PCIDEVADDR_INVALID) { > + pci_dev_init(&pcidev, ret); Just wondering, and perhaps this question is more general: does this = test really need the Red-Hat test device? I know it is an emulated device, but can=E2=80=99t we use some other = MMIO address (e.g., PIT) that is also available on bare-metal?